This is really fun! The 1hp concept is interesting and makes it very intense, but the soft music/sfx balances it nicely so it never feels too overwhelming. The furthest I made it so far was room 4. I'm curious how many rooms there are in total, the screenshots look intense.
There was something I was colliding with in the 3rd room here that didn't look like I should be.
Minor issue aside I loved the game! I'm gonna play a bit more and see if I can get past room 4. Congrats on your first game jam submission!